一直搞不懂为什么EdgeRendererSelector 是继承ComboBox的，看一下source code 就知道了
http://code.google.com/p/birdeye/source/browse/trunk/ravis/libRaVis/org/un/cava/birdeye/ravis/components/ui/controls/vgraphControls/EdgeRendererSelector.mxml?r=1807
<?xml version="1.0" encoding="utf-8"?><!-- * * The MIT License * * Copyright (c) 2008 * United Nations Office at Geneva * Center for Advanced Visual Analytics * http://cava.unog.ch * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * --><mx:ComboBoxxmlns:mx="http://www.adobe.com/2006/mxml" height="20" width="100%" color="#CCCCCC" prompt="Select edge style." toolTip="Select the style of line drawn between nodes." initialize="initData()" change="changeEdgeRenderer()"> <mx:ArrayCollectionid="ervalues"> <mx:String>Default</mx:String> <mx:String>DirectedArrows</mx:String> <mx:String>DirectedBalloons</mx:String> <mx:String>Orthogonal</mx:String> <mx:String>Flow</mx:String> <mx:String>Bezier</mx:String> <mx:String>Circular</mx:String> <mx:String>Hyperbolic</mx:String> </mx:ArrayCollection> <mx:Script> <![CDATA[ import mx.utils.ObjectUtil; import org.un.cava.birdeye.ravis.graphLayout.visual.IVisualGraph; import org.un.cava.birdeye.ravis.graphLayout.visual.VisualGraph; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.BaseEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.CircularEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.DirectedArrowEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.DirectedBalloonEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.FlowCurveEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.FlowEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.HyperbolicEdgeRenderer; import org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers.OrthogonalEdgeRenderer; import org.un.cava.birdeye.ravis.utils.LogUtil; import org.un.cava.birdeye.ravis.utils.events.VGraphEvent; private static const _LOG:String = "components.ui.controls.vgraphControls.EdgeRendererSelector"; private var _vgraph:VisualGraph; /** * Provides access to the registered vgraph object. * */ public function set vgraph(v:VisualGraph):void { _vgraph = v; registerListeners(); } /** * @private * */ public function get vgraph():VisualGraph { return _vgraph; } /** * When enabling or disabling this component, we also * perform some specific tasks. * Attention do completely disable interaction * there is also the mouseEnabled property. * * @inheritDoc * */ override public function set enabled(e:Boolean):void { if(e == true) { this.setStyle("color",0x000000); this.alpha=1; } else { this.setStyle("color",0xCCCCCC); this.alpha=0.3; } /* call superclass (ComboBox) */ super.enabled = e; } /** * Set the selected EdgeLabelRenderer. * */ public function changeEdgeRenderer():void { var er:String; var g:IVisualGraph; if(_vgraph == null) { LogUtil.warn(_LOG, "Cannot change EdgeRenderer, no valid vgraph!"); return; } g = _vgraph; /* get the currently selected EdgeRenderer */ er = this.selectedItem as String; switch(er) { case "Default": _vgraph.edgeRendererFactory = new ClassFactory(BaseEdgeRenderer); break; case "DirectedArrows": _vgraph.edgeRendererFactory = new ClassFactory(DirectedArrowEdgeRenderer); break; case "DirectedBalloons": _vgraph.edgeRendererFactory = new ClassFactory(DirectedBalloonEdgeRenderer); break; case "Orthogonal": _vgraph.edgeRendererFactory = new ClassFactory(OrthogonalEdgeRenderer); break; case "Flow": _vgraph.edgeRendererFactory = new ClassFactory(FlowEdgeRenderer); break; case "Bezier": _vgraph.edgeRendererFactory = new ClassFactory(FlowCurveEdgeRenderer); break; case "Circular": _vgraph.edgeRendererFactory = new ClassFactory(CircularEdgeRenderer); break; case "Hyperbolic": _vgraph.edgeRendererFactory = new ClassFactory(HyperbolicEdgeRenderer); break; default: LogUtil.warn(_LOG, "Illegal EdgeRenderer selected:"+er); _vgraph.edgeRendererFactory = new ClassFactory(BaseEdgeRenderer); break; } _vgraph.refresh(); } /** * Refresh the selector with the current EdgeLabelRenderer. * */ public function refreshSelector(e:VGraphEvent = null):void { var erClassName:String; if(_vgraph == null) { LogUtil.warn(_LOG, "Cannot refresh EdgeRenderer, no valid vgraph!"); return; } erClassName = ObjectUtil.getClassInfo(_vgraph.edgeRendererFactory.newInstance()).name; erClassName = erClassName.replace(/org.un.cava.birdeye.ravis.graphLayout.visual.edgeRenderers::/,""); switch(erClassName) { case "BaseEdgeRenderer": this.selectedIndex = 0; break; case "DirectedArrowEdgeRenderer": this.selectedIndex = 1; break; case "DirectedBalloonEdgeRenderer": this.selectedIndex = 2; break; case "OrthogonalEdgeRenderer": this.selectedIndex = 3; break; case "FlowEdgeRenderer": this.selectedIndex = 4; break; case "FlowCurveEdgeRenderer": this.selectedIndex = 5; break; case "CircularEdgeRenderer": this.selectedIndex = 6; break; case "HyperbolicEdgeRenderer": this.selectedIndex = 7; break; default: LogUtil.warn(_LOG, "Illegal EdgeRenderer class received:"+erClassName); break; } } /** * initialise the selection data. * It is a bit unclear, why this seems to be necessary. * */ private function initData():void { this.dataProvider = ervalues; } /** * register event listener * */ private function registerListeners():void { _vgraph.addEventListener(VGraphEvent.VGRAPH_CHANGED,refreshSelector); } ]]> </mx:Script></mx:ComboBox> <?xml version="1.0" encoding="utf-8"?><!-- * * The MIT License * * Copyright (c) 2008 * United Nations Office at Geneva * Center for Advanced Visual Analytics * http://cava.unog.ch * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * --><mx:ComboBoxxmlns:mx="http://www.adobe.com/2006/mxml" height="20" width="95%" color="#CCCCCC" prompt="Select layout algorithm." toolTip="Some layouters may not be fully stable." initialize="initData()" change="changeLayouter()"> <mx:ArrayCollectionid="layouts"> <mx:String>---Radial---</mx:String> <mx:String>ConcentricRadial</mx:String> <mx:String>ParentCenteredRadial</mx:String> <mx:String>SingleCycleCircle</mx:String> <mx:String>Hyperbolic</mx:String> <mx:String>---Tree---</mx:String> <mx:String>Hierarchical</mx:String> <mx:String>---Physics---</mx:String> <mx:String>ForceDirected</mx:String> <mx:String>ISOM</mx:String> <mx:String>---Coordinates---</mx:String> <mx:String>DirectPlacement</mx:String> <mx:String>---Experimental---</mx:String> <mx:String>Phyllotactic</mx:String> </mx:ArrayCollection> <mx:Script> <![CDATA[ import mx.utils.ObjectUtil; import org.un.cava.birdeye.ravis.utils.LogUtil; import org.un.cava.birdeye.ravis.utils.events.VGraphEvent; import org.un.cava.birdeye.ravis.graphLayout.visual.VisualGraph; import org.un.cava.birdeye.ravis.graphLayout.layout.ILayoutAlgorithm; import org.un.cava.birdeye.ravis.graphLayout.layout.CircularLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.ConcentricRadialLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.DirectPlacementLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.ForceDirectedLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.HierarchicalLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.Hyperbolic2DLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.ISOMLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.ParentCenteredRadialLayouter; import org.un.cava.birdeye.ravis.graphLayout.layout.PhylloTreeLayouter; private static const _LOG:String = "components.ui.controls.layouterControls.LayoutSelector"; private var _vgraph:VisualGraph; /** * Provides access to the registered vgraph object. * */ public function set vgraph(v:VisualGraph):void { _vgraph = v; registerListeners(); } /** * @private * */ public function get vgraph():VisualGraph { return _vgraph; } /** * When enabling or disabling this component, we also * perform some specific tasks. * Attention do completely disable interaction * there is also the mouseEnabled property. * * @inheritDoc * */ override public function set enabled(e:Boolean):void { if(e == true) { this.setStyle("color",0x000000); this.alpha=1; } else { this.setStyle("color",0xCCCCCC); this.alpha=0.3; } /* call superclass (ComboBox) */ super.enabled = e; } /** * Set the selected Layouter. * */ public function changeLayouter():void { /* check if we have a vgraph at all */ if(_vgraph == null) { LogUtil.warn(_LOG, "Cannot change Layouter without vgraph."); return; } setLayouter(); _vgraph.draw(); // run the layout } /** * Set/Activate the layouter set in the selector. * */ public function setLayouter():void { var layouter:ILayoutAlgorithm; var layouterName:String = (this.selectedItem as String); /* check if we have a vgraph at all */ if(_vgraph == null) { LogUtil.warn(_LOG, "Cannot change Layouter without vgraph."); return; } /* kill off animation in old layouter if present */ if(_vgraph.layouter != null) { _vgraph.layouter.resetAll(); /* remove also existing references thus * destroying the object (maybe this is not needed?) */ _vgraph.layouter = null; } /* now choose the selected layouter */ switch(layouterName) { case "ConcentricRadial": layouter = new ConcentricRadialLayouter(_vgraph); break; case "ParentCenteredRadial": layouter = new ParentCenteredRadialLayouter(_vgraph); break; case "SingleCycleCircle": layouter = new CircularLayouter(_vgraph); /* set the hyperbolic edge renderer type * _vgraph.edgeRenderer = new CircularEdgeRenderer(); _vgraph.scrollBackgroundInDrag = false; _vgraph.moveNodeInDrag = false; absoluteScaling = true; updateScale(); */ break; case "Hyperbolic": layouter = new Hyperbolic2DLayouter(_vgraph); /* set some layouter specific defaults: _vgraph.edgeRenderer = new HyperbolicEdgeRenderer((layouter as Hyperbolic2DLayouter).projector); _vgraph.scrollBackgroundInDrag = false; _vgraph.moveNodeInDrag = false; absoluteScaling = false; */ break; case "Hierarchical": layouter = new HierarchicalLayouter(_vgraph); break; case "ForceDirected": layouter = new ForceDirectedLayouter(_vgraph); break; case "ISOM": layouter = new ISOMLayouter(_vgraph); break; case "DirectPlacement": layouter = new DirectPlacementLayouter(_vgraph); /* set some layouter specific values, i.e. create a control * for these first, also they could be prepopulated from * XML data (layouter as DirectPlacementLayouter).relativeHeight = 400; (layouter as DirectPlacementLayouter).relativeWidth = 400; */ /* /* set the orthogonal edge renderer type * _vgraph.edgeRenderer = new OrthogonalEdgeRenderer(); _vgraph.scrollBackgroundInDrag = true; _vgraph.moveNodeInDrag = true; absoluteScaling = true; updateScale(); */ break; case "Phyllotactic": layouter = new PhylloTreeLayouter(_vgraph); break; default: LogUtil.warn(_LOG, "Illegal Layouter selected, defaulting to ConcentricRadial"+ layouterName); layouter = new ConcentricRadialLayouter(_vgraph); break; } _vgraph.layouter = layouter; } /** * Refresh the selector if an external event changes the layouter. * */ public function refreshSelector(e:VGraphEvent = null):void { var layouterClassName:String; var layouterName:String; /* check if we have a vgraph/layouter at all */ if(_vgraph == null || _vgraph.layouter == null) { LogUtil.warn(_LOG, "Cannot refresh the LayoutSelector without vgraph or Layouter."); return; } layouterClassName = ObjectUtil.getClassInfo(_vgraph.layouter).name; layouterClassName = layouterClassName.replace(/org.un.cava.birdeye.ravis.graphLayout.layout::/,""); /* now choose the selected layouter */ switch(layouterClassName) { case "ConcentricRadialLayouter": layouterName = "ConcentricRadial"; break; case "ParentCenteredRadialLayouter": layouterName = "ParentCenteredRadial"; break; case "CircularLayouter": layouterName = "SingleCycleCircle"; break; case "Hyperbolic2DLayouter": layouterName = "Hyperbolic"; break; case "HierarchicalLayouter": layouterName = "Hierarchical"; break; case "ForceDirectedLayouter": layouterName = "ForceDirected"; break; case "ISOMLayouter": layouterName = "ISOM"; break; case "DirectPlacementLayouter": layouterName = "DirectPlacement"; break; case "PhylloTreeLayouter": layouterName = "Phyllotactic"; break; default: layouterName = "Unknown"; LogUtil.warn(_LOG, "Unknown Layouter found:"+layouterClassName); break; } /* make the selection */ /* XXX THIS MAY CAUSE A LOOP POSSIBLY */ this.selectedItem = layouterName; } /** * initialise the selection data. * It is a bit unclear, why this seems to be necessary. * */ private function initData():void { this.dataProvider = layouts; } /** * Adds the listeners to update on changes in the VGraph * */ private function registerListeners():void { _vgraph.addEventListener(VGraphEvent.LAYOUTER_CHANGED,refreshSelector); } ]]> </mx:Script></mx:ComboBox>转载于:https://www.cnblogs.com/lauraxia/archive/2013/02/18/2915720.html
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